PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/12-00:12:40
G01     68.2           32.6                7.9 +/-    1.36      13.2 +/-    1.36  0.030 / 0.050
G07     138.7          29.4                9.4 +/-    0.95      16.8 +/-    0.95  0.040 / 0.050
G11     53.9           31.5                6.7 +/-    1.11      11.5 +/-    1.11  0.040 / 0.070
G13     272.4          37.0                9.4 +/-    2.72      14.4 +/-    2.72  0.050 / 0.080
G15     300.0          16.1                6.7 +/-    1.56      16.3 +/-    1.56  0.030 / 0.020
G17     236.4          68.2                8.1 +/-    0.61       8.6 +/-    0.61  0.030 / 0.030
G19     226.0          44.1               10.2 +/-    2.46      13.9 +/-    2.46  0.040 / 0.100
G28     24.5           58.5                8.8 +/-    3.53      10.1 +/-    3.53  0.080 / 0.100
G30     137.4          56.1               10.3 +/-    0.96      12.1 +/-    0.96  0.060 / 0.100